Free Energy and Equilibrium (Section)
The value of Ka for nitrous acid (HNO2) at 25 °C is given in Appendix D. (a) Write the chemical equation for the equilibrium that corresponds to Ka. (b) By using the value of Ka, calculate ΔG° for the dissociation of nitrous acid in aqueous solution. (c) What is the value of ΔG at equilibrium? (d) What is the value of ΔG when [H+] = 5.0 × 10-2 M, [NO2 -] = 6.0 × 10-4 M, and [HNO2] = 0.20 M?
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